Hi Friends have told me that they are making a project to generate electricity by using sound. I want to know by which method or how we can generate electricity by using sound?
The most plausible method is a piezoelectric generator that is tuned to specific harmonic frequencies. A more recent approach by Zhong Lin Wang and colleagues, utilizes MEMS technology, where piezoelectric crystal cantilevers are ZnO grown in the form of nanorods. Vibrational frequencies cause the nanorods to deform and in this process a voltage bias is generated suitable for small scale electronics.